Unicode Character 'OBJECT REPLACEMENT CHARACTER' (U+FFFC)

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Do not use this character in domain names. Browsers are blacklisting it because of the potential for phishing.
Unicode Data
Name OBJECT REPLACEMENT CHARACTER
Block Specials
Category Symbol, Other [So]
Combine 0
BIDI Other Neutrals [ON]
Mirror N
Index entries OBJECT REPLACEMENT CHARACTER
REPLACEMENT CHARACTER, OBJECT
Comments used as placeholder in text for an otherwise unspecified object
Version [2.1]
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +FFFC
UTF-8 (hex) 0xEF 0xBF 0xBC (efbfbc)
UTF-8 (binary) 11101111:10111111:10111100
UTF-16 (hex) 0xFFFC (fffc)
UTF-16 (decimal) 65,532
UTF-32 (hex) 0x0000FFFC (fffc)
UTF-32 (decimal) 65,532
C/C++/Java source code "\uFFFC"
Python source code u"\uFFFC"
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Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock SPECIALS
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_OTHER_NEUTRALS [13]
Character.getNumericValue() -1
Character.getType() 28
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() No
Character.isJavaIdentifierStart() No
Character.isLetter() No
Character.isLetterOrDigit() No
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() No
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No